(1980). Evaluation of sludge management systems: Evaluation checklist and supporting commentary. Office of Water Programs Operations.
Chicago-Zitierstil (17. Ausg.)Evaluation of Sludge Management Systems: Evaluation Checklist and Supporting Commentary. Washington, D.C: Office of Water Programs Operations, 1980.
MLA-Zitierstil (9. Ausg.)Evaluation of Sludge Management Systems: Evaluation Checklist and Supporting Commentary. Office of Water Programs Operations, 1980.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.